Add video link for Symmetric Difference
Add video link for Symmetric Difference
otavioarc/freeCodeCamp,HKuz/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,pahosler/freecodecamp,BhaveshSGupta/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,otavioarc/freeCodeCamp,HKuz/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,pahosler/freecodecamp,raisedadead/FreeCodeCamp